Method feed

progsrc/include/tests/utils.hpp:30–35

public:
  void feed(const void *data, size_t length) {
    for (size_t i = 0; i < length; i++) {
      state_ ^= ((uint8_t *)data)[i];
      state_ *= PRIME;
    }
  }

  void feed(const cVector &vec) {
    feed(vec.data, sizeof(FLOAT_DMEM) * vec.N);